This user's guide contains information and support documentation for the JFE2140 evaluation module (EVM). Included are the circuit description, schematic, and bill of materials of the JFE2140EVM. Throughout this document, the terms evaluation board, evaluation module, and EVM are synonymous with the JFE2140EVM.
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This section provides a basic description of the devices used, kit contents, EVM limitations, and related documentation.
The JFE2140 is a Burr-Brown™ matched-pair, discrete JFET built using Texas Instruments' modern, high performance, analog bipolar process. The JFE2140 features performance not previously available in older discrete JFET technologies. The JFE2140 offers excellent noise performance across all current ranges, where the quiescent current is adjustable from 50 μA to 20 mA. When biased at 5 mA, the device yields 0.9 nV/√Hz of input-referred noise.
The JFE2140EVM provides a basic functional evaluation of the JFE2140 device. Key EVM features include: